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Author Subject: Engine Boffins? Urgent Help H/G Fail
dannyb1

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Location: Midlands

Registered: 22 Jan 2008

Posts: 178

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Post #1
Make sure the injectors on those two are actually firing , either use a light bulb meter or a DVM on the wiring.

Secondly i would try a compression test.

you only need three things to run an engine, spark , fuel and comression. Your claiming you have the first two Smile

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Posted 2nd Apr 2010 at 20:47
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #2
errr, disconnecting the crank sensor should stop it running.

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Posted 2nd Apr 2010 at 20:48
rich-6

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Registered: 06 May 2007

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Post #3
So the coils are working fine as are the injectors but the cylinders not firing?

You had the plugs out? I would Smile

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Posted 2nd Apr 2010 at 20:50
daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

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Post #4
He does'nt know if the injectors are firing, just that it doesnt change if he removes them. Check the injectors are getting voltage if you can.
Failing that, as said I'd be doing a compression test next. You have tried new plugs i take it, because if its been running on two the plugs will almost certainly be fouled by now.

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Posted 2nd Apr 2010 at 22:25
daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

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Post #5
A grinding noise will definitely NOT be caused by the stepper motor.

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Posted 2nd Apr 2010 at 23:41
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

Status: Offline

Post #6
blue sensor is nowhere near the crank Laugh my ass off


its the CAM sensor.

my guess would be that the HG has gone between 3 and 4, same as AdamB's Rallye did end of last year.

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Posted 2nd Apr 2010 at 23:57
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

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Post #7
adam didn't lose any cooling system pressure, just all of his cylinder compression, so a compression test with all plugs out is the way forward.

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Posted 3rd Apr 2010 at 00:35
bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

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Post #8
sounds like head gasket to me as well - compression test will show you. Hope not dude or it will head off skimmed and new everything Sad - bolts gaskets seals etc
Posted 3rd Apr 2010 at 00:37
puglover Banned!

Location: Far out there

Registered: 08 Jun 2006

Posts: 6,095

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Post #9
piston rings?

check your breathers see if its breathing heavy. if not id say HG as well.
Posted 3rd Apr 2010 at 01:07
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #10
cheaper to just get it fixed in Leeds Thumbs up

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Posted 3rd Apr 2010 at 01:08
puglover Banned!

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Post #11
whos in leeds?

edit just realised he lives in leeds. not all mechanics can be trusted though Sad
Posted 3rd Apr 2010 at 01:13
phillipm

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Location: Rotherham

Registered: 15 Oct 2006

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Post #12
Find the problem first LOL

I've a compression tester here you can borrow if you can't find yours.

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Posted 3rd Apr 2010 at 01:17
james_geldart

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Location: Yorkshire

Registered: 20 Jul 2005

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Post #13
gnrlee wrote:
Mechanical repairs recon's

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Posted 3rd Apr 2010 at 01:18
alastairh

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Location: Kettering

Registered: 14 Jun 2007

Posts: 375

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Post #14
I was going to say. You could get a years aa cover for the

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Posted 3rd Apr 2010 at 02:11
allesclar

Seasoned Pro

Location: Sheffield

Registered: 17 May 2009

Posts: 4,254

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Post #15
gnrlee wrote:
puglover wrote:
piston rings?

check your breathers see if its breathing heavy. if not id say HG as well.


no the breathing just seems to be as normal Sad

welshpug! wrote:
cheaper to just get it fixed in Leeds Thumbs up


or in Sheffield where it is LOL
I'm just funny about letting f*cking monkeys at my car! but beggars can't be choosers! any recommendations of garages in Sheff or neighboring areas? Unsure

puglover wrote:
whos in leeds?

edit just realised he lives in leeds. not all mechanics can be trusted though Sad


Yeah I live in leeds but I spend a lot of time with the girlfriend in Sheffield which is where all this mess started Dry I'll only be letting a garage do it that proove their compliance how i'm going to do that I don't know LOL

phillipm wrote:
Find the problem first LOL

I've a compression tester here you can borrow if you can't find yours.


well yeah very true it's not over until the fat lady sings! fingers crosses! Unsure
I've got a compression tester just a Halfords special but it'll do the job!

thank you for the offer though I really appreciate that!

james_geldart wrote:


what level rac/aa cover do you (or someone whos willing to spend a day sat with you) have mate - depending on that they will toe you to a garage of your choice


I got p*ssed off with the AA for auto renewing my membership without even warning me that my last one was coming to an end so I sapt my dummy out!
the 6 has been in retirement for the last year or so and only recently started driving it again but never got around to getting any cover as of yet!

Mellow

but I may hold you to that LOL
Thank you though!


alastairh wrote:
I was going to say. You could get a years aa cover for the

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Posted 3rd Apr 2010 at 06:38
thugpuggin

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Location: Bristol

Registered: 10 Apr 2004

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Post #16
gnrlee wrote:
from right to left (facing from front)

Cylinder 1 155 PSI

Cylinder 2 180 PSI

Cylinder 3 5 PSI if that

Cylinder 4 5 PSI if that

which looks like the Head Gasket Cry


Can they really go that low? 5 PSI Shock

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Posted 3rd Apr 2010 at 05:59
smegal

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Location: Leeds

Registered: 26 Dec 2005

Posts: 5,940

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Post #17
I'd have a word with a local garage and with Carl, it may still work out cheaper than someone who doesn't know the engine [especially if they don't know about the bottom pulleys that can slip].

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Posted 3rd Apr 2010 at 06:27
allesclar

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Location: Sheffield

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Post #18
right, there has been alot of recent talk of HG failure, what simple mistakes can cause this?

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Posted 3rd Apr 2010 at 06:40
bigbadbowen

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Location: Winchester

Registered: 21 Nov 2003

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Post #19
heat from the exhaust manifold warps the head and thus gasket faliure - seen it a million times now.

Head off - skim re seat valves etc then new gasket seals bolts thermostat n seal inlet and exhaust gasket - job done

no need to replace rings
Posted 3rd Apr 2010 at 06:59
allesclar

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Location: Sheffield

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Post #20
bigbadbowen wrote:
heat from the exhaust manifold warps the head and thus gasket faliure - seen it a million times now.

Head off - skim re seat valves etc then new gasket seals bolts thermostat n seal inlet and exhaust gasket - job done

no need to replace rings


is that why alot of people use this manifold wrap to keep the heat within the manifold and stop it heating everything up?

worth while getting manifold wrap you think bigbadbowen?

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Posted 3rd Apr 2010 at 07:03
puglover Banned!

Location: Far out there

Registered: 08 Jun 2006

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Post #21
In theory yes but the heat is really just trapped within the tubing instead of disepating outwards. This could also mean higher head and valve temperatures.
Posted 3rd Apr 2010 at 07:25
phillipm

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Post #22
Not keeping a strong enough mix of antifreeze in there can cause corrosion in the waterways which eats the edges of the gasket (acid formation in the crevices from the corrsion).

If you want it picking up and moving I've got a mate with a recovery truck that's not too bad on rates, rikky used him to move his car home after the cage.

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Posted 3rd Apr 2010 at 08:06
Rich E Forum Admin

Location: Hertfordshire

Registered: 27 Apr 2005

Posts: 7,757

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Post #23
allesclar wrote:
bigbadbowen wrote:
heat from the exhaust manifold warps the head and thus gasket faliure - seen it a million times now.

Head off - skim re seat valves etc then new gasket seals bolts thermostat n seal inlet and exhaust gasket - job done

no need to replace rings


is that why alot of people use this manifold wrap to keep the heat within the manifold and stop it heating everything up?

worth while getting manifold wrap you think bigbadbowen?

No, wrapping the exhaust manifold will increase heat transfer into the head as it reduces the heat dissipation to the engine bay.

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Posted 3rd Apr 2010 at 15:50
ryangti6

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Location: Pontypool

Registered: 01 Sep 2006

Posts: 1,839

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Post #24
bigbadbowen wrote:
heat from the exhaust manifold warps the head and thus gasket faliure - seen it a million times now.



So is everyone saying this is correct as that is one of the strangest things I have ever heard connected to head gasket failure?

For the OP's problem what you are saying with the grinding noise then it going away and being on 2 cylinders sounds very much like when the head fell off a valve on my old one.
Hopefully for you this is not the case and it will just be head gasket failure though.

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Posted 3rd Apr 2010 at 23:31
mabgti

NV motors

Location: Bham tunnel @7400rpm

Registered: 28 Aug 2003

Posts: 9,127

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Post #25
Rich E wrote:
allesclar wrote:
bigbadbowen wrote:
heat from the exhaust manifold warps the head and thus gasket faliure - seen it a million times now.

Head off - skim re seat valves etc then new gasket seals bolts thermostat n seal inlet and exhaust gasket - job done

no need to replace rings


is that why alot of people use this manifold wrap to keep the heat within the manifold and stop it heating everything up?

worth while getting manifold wrap you think bigbadbowen?

No, wrapping the exhaust manifold will increase heat transfer into the head as it reduces the heat dissipation to the engine bay.


One reason why i havent wrapped mine.. neither has MR walker..

5Psi.. sounds to me summit more than HGF!

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Posted 4th Apr 2010 at 01:18

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